Methods and Apparatuses for Data Retransmission Using Sidelink Diversity

2. The method of claim 1, wherein the data transmission is either a unicast transmission or a multicast transmission via a Group-Radio Radio Network Temporary Identifier (G-RNTI) and wherein the multicast transmission is to a UE group which comprises at least the helper UE, and the target UE.

4. The method of claim 3, further comprising determining whether the data transmission is for the target UE based in part on a map of a set of UEs, the map capable of uniquely identifies at least the target UE and the helper UE.

6. The method of claim 5, wherein the trigger message is received upon the helper UE successfully decoding at least part of the data transmission and upon the helper UE transmitting an indication to the network node that at least part of the data transmission has been successfully decoded.

7. The method of claim 5, wherein the trigger message comprises a modulation and coding scheme (MCS), a precoding matrix indicator (PMI), and a rank indicator (RI) for retransmitting the data transmission.

8. The method of claim 1, wherein the field indicating whether the data transmission is intended for the helper UE is a one-bit field.

10. The method of claim 9, wherein the data transmission is either a unicast transmission or a multicast transmission via a Group-Radio Network Temporary Identifier (G-RNTI) and wherein the multicast transmission is to a helper UE group of which the helper UE is a member.

11. The method of claim 9, wherein the network node comprise one of a base station or a programmable logical control (PLC) node, and wherein the control message indicates a UE identifier for the target UE when the control message indicates that the data transmission is intended for the target UE.

12. The method of claim 9, further comprising transmitting a trigger message to the helper UE upon failing to receive an ACK from the target UE on the data transmission, wherein the trigger message indicates to the helper UE to re-transmit the data transmission to the target UE using a sidelink.

13. The method of claim 12, wherein the trigger message is sent to the helper UE upon receiving an indication from the helper UE that at least part of the data transmission has been successfully decoded.

14. The method of claim 12, wherein the trigger message comprises a modulation and coding scheme (MCS), a precoding matrix indicator (PMI), and a rank indicator (RI) for retransmitting the data transmission.

15. The method of claim 9, wherein the DCI field is a one- bit field.

17. The helper UE of claim 16, wherein the data transmission is either a unicast transmission or a multicast transmission via a Group-Radio Radio Network Temporary Identifier (G-RNTI) and wherein the multicast transmission is to a UE group which comprises at least the helper UE, and the target UE.

18. The helper UE of claim 16, wherein the at least one processor is further configured to receive the control message from the network node prior to receiving the data transmission, wherein the control message indicates a UE identifier for the target UE.

19. The helper UE of claim 18, wherein the at least one processor is further configured to determine whether the data transmission is for the target UE based in part on a map of a set of UEs, the map capable of uniquely identifies at least the target UE and the helper UE.

20. The method of claim 16, wherein the field indicating whether the data transmission is intended for the helper UE is a one-bit field.

22. The apparatus of claim 21, wherein the data transmission is either a unicast transmission or a multicast transmission via a Group-Radio Radio Network Temporary Identifier (G-RNTI) and wherein the multicast transmission is to a UE group which comprises at least the helper UE and the target UE.

23. The apparatus of claim 21, further comprising means for receiving the control message from the network node prior to receiving the data transmission, wherein the control message indicates a UE identifier for the target UE.

24. The apparatus of claim 23, further comprising means for determining whether the data transmission is for the target UE based in part on a map of a set of UEs, the map capable of uniquely identifies at least the target UE and the helper UE.

25. The method of claim 21, wherein the field indicating whether the data transmission is intended for the helper UE is a one-bit field.